17 00 005 Draining off and topping up coolant (M54)
| WARNING | Danger of scalding! Only carry out work on the cooling system after the engine has cooled down! |
Recycling
Catch and dispose of drained coolant.
Observe country-specific waste-disposal regulations.
Necessary preliminary tasks
- E85: Remove radiator cover. See «Removing Radiator Cover»(ref-203326-S18902029262006012600000).
- Remove engine underbody protection.
Note. All illustrations feature the E85.
Note. Follow instructions for working on cooling system.
Draining coolant
Open cap (1) on coolant expansion tank.
Scheme 1
Open drain plug (1) on radiator at bottom.
Drain, catch and dispose off coolant.
Open drain plug (2) on coolant expansion tank at bottom.
Drain, catch and dispose off coolant.
Installation
Replace sealing ring.
Tightening torque, see 17 11 2AZ in COOLING SYSTEM - TIGHTENING TORQUES.
Scheme 2
Open drain plug (1) on engine block.
Drain, catch and dispose off coolant.
Installation
Replace sealing ring.
Tightening torque, see 11 11 5AZ in ENGINE - TIGHTENING TORQUES.
Scheme 3
Adding coolant
Open vent screw (1).
Scheme 4
Before filling
- Switch ignition on.
- Set heater control to maximum temperature.
- Set fan to low setting. This opens the heating valves.
Perform filling operation slowly.
Close vent screw when bubble-free coolant emerges. Fill coolant expansion tank to max. cold fill level. Marking (2) is then on a level with upper edge of coolant expansion tank.
Note. Use only recommended coolant.
Vent cooling system and check for leaks. See 17 00 039 Venting Cooling System And Checking For Leaks (M54 / M56).
Scheme 5
17 21 500 Flushing oil cooler with lines (automatic transmission)
Special tools required
- 17 2 018
- 17 2 019
Note. Carry out the work steps listed when: Fitting a new or replacement transmission Flushing can only be carried out with the automatic transmission removed.
Procedure
Automatic transmission removed.
Connect appropriate adapters to oil lines exiting from automatic transmission.
Connect the connecting line 17 2 019 from the oil collection unit with the quick-release coupling.
Connect drain line 17 2 018 using quick-release coupling.
Feed open end of drain line into a suitable collection container.
Using oil collection unit, flush approx. 1 liter of transmission fluid through oil lines and oil cooler.
Reposition quick-release couplings.
Flush oil lines/oil cooler in opposite direction with approx. 1 liter of transmission fluid.
Disconnect quick-release couplings, remove adapters.
Note. Dispose of flushing oil properly; do not under any circumstances reuse it.
Arrangement of flushing device for transmissions A5S 310Z, A5S 560Z, A5S 360R/390R, A4S 200R, A5S 325Z, GA6HP26Z
Scheme 6
Arrangement of flushing device for transmission A4S 310R
Scheme 7
Scheme 8
Scheme 9
Special tools required
- 17 2 018
- 17 2 019
Note. Carry out the work steps listed when: Fitting a new or replacement transmission Flushing can only be carried out with the automatic transmission removed.
Procedure
Automatic transmission removed.
Connect appropriate adapters to oil lines exiting from automatic transmission.
Connect the connecting line 17 2 019 from the oil collection unit with the quick-release coupling.
Connect drain line 17 2 018 using quick-release coupling.
Feed open end of drain line into a suitable collection container.
Using oil collection unit, flush approx. 1 liter of transmission fluid through oil lines and oil cooler.
Reposition quick-release couplings.
Flush oil lines/oil cooler in opposite direction with approx. 1 liter of transmission fluid.
Disconnect quick-release couplings, remove adapters.
Note. Dispose of flushing oil properly; do not under any circumstances reuse it.
Arrangement of flushing device for transmissions A5S 310Z, A5S 560Z, A5S 360R/390R, A4S 200R, A5S 325Z, GA6HP26Z
Scheme 10
Arrangement of flushing device for transmission A4S 310R
Scheme 11
Arrangement of flushing device for transmission A4S 300J
Scheme 12
Scheme 13
See also:
• COOLING SYSTEM - TECHNICAL DATA